654 search results - page 77 / 131 » Complexity of Answering Queries Using Materialized Views |
109
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ICDE
2011
IEEE
14 years 3 months ago
2011
IEEE
—It is increasingly common to find graphs in which edges bear different types, indicating a variety of relationships. For such graphs we propose a class of reachability queries ...
DANTE
1999
IEEE
15 years 4 months ago
1999
IEEE
Data warehouse refreshment is often viewed as a problem of maintaining materialized views over operational sources. In this paper, we show that the data warehouse refreshment proc...
PODS
2006
ACM
15 years 12 months ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
126
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MOBICOM
2010
ACM
15 years 15 hour ago
2010
ACM
Consider mobile targets moving in a plane and their movements being monitored by a network such as a field of sensors. We develop distributed algorithms for in-network tracking an...
121
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DBISP2P
2006
Springer
15 years 3 months ago
2006
Springer
Abstract. This paper addresses the problem of data placement, indexing, and querying large XML data repositories distributed over an existing P2P service infrastructure. Our archit...